My boys are early risers, no matter what time they go to bed, although they ARE getting better at sleeping in.
My 7 yr old is usually up by 7 every day, no matter what.  He scared the crap outta me over Christmas break when he was sick.  I woke up at9, and he was still asleep!  I had to go check and see if he as still breathing, because he's NEVER in bed that late!